Universal lathe attachment.



H. 1...HJQR'TH.- UNIVERSAL' LATHEATIACHMENT. APPLlCATIO FILED SEPT. 6.1913.

1,232,801 Patented Ju1y10,1917.

3 SHEETS-SHEET 1 H.1.H10RTH. uNTvERsAL LATHE ATTACHMENT.

APPLICATION FILED SEPT-5.19l3. ,801 y Y Patented July 10, 1917;

a SHEETS-SHEET z.

H. 1. HJURTH.

UNIVERSAL LATHE ATTACHMENT.

APPLxcATloN man svEPr. s, |913.

Patented July 10, 1917.

afar:

Ja t/e UNITED sTATEs PATENT oEEIoE.

HENRICK J. vHJ'OIIIEI, 0F WOB'U'RN. MASSACHUSETTS.

UNIVERSAL LATHE ATTACHMENT.

To all whom t may Gomera:

Be it known that I, HENRICK J. Haon'rrr,

a citizen of the United States, and resident' of Woburn, in the countyof Middlesex and State of Massachusetts, have invented certain new anduseful Improvements in Universal Lathe Attachments, of 'which thefollowing vis a specification.

The present invention relates to an attachnent for lathes, beingdesigned particularly, for lathes*l of the type known as bench lathes.The attachment is more particularly designed to hold work in position tobe acted upon by a milling cutter and is rdvided with adjustments`whereby all 'nds of `milling operations may` bc pen formed on the workso held. The essential principles of the invention, however, are notlimited to an apparatus for holding worksimplyfto be operated upon'by amill ing cutter, but are capable of embodiment in constructions designed`for other uses.A Accordingly, in its broader aspects my invenited.

In the accompanying drawings, wherein I have shown the preferredembodiment of my invention, Figure '1 is a plan. view of the Yattachment.- I

Fig. 2 is a plan view of the longitudinal feedingv and indexingmechanism used in connection with the attachment.

F ig. 3 is a front elevation of the attach-` screw is rotated. by acrank 16.

ment shown in osition on the lathe.

Fig..4 is a ront elevation of the feed mechanism shown in Fig. 2.

Fi 5 is a right hand end-elevation of the and 4.

Figs. 7 and 8 are respectively a plan View and a longitudinal section ofthe cross feed mechanism which tachment.

forms a( part of the at- Specication of Letters Patent. Pafented July10, 1917,

Application filed September 6, 1913.' Serial No. 788,481.

Like. reference characters designate the same parts in allv the figures.

This attachment is ada ted to be mounted on the ways of a lathe an( tobe moved along suchways toward and romthe head` stock', the ordinaryfoot stock of the lathe having first been removed. I have' notillustrated the lathe itself because this invention relates particularlyto the attachment andthe construction of the attachment and the mode inwhich 'it is used may be suiiciently well understood without anyparticular description of the lathe itself. All of the lathe that isshown appears in Fig. 3, where the'ways are indicated at 1 and the headstock spindle at T2, with a milling cutter 3 secured upon it. It may besaid that the lathe may be of any desired character, either a standardor a special lathe, and that the head stock and the means for drivingthe head stock spindle 2 may beA of any'ordinaryor special construction.

The attachment proper comprises a base liwhich -is adapted to rest uponthe bed .of the lathe fitting the ways thereof and contains alongitudinal slide fla. Mountedy on such longitudinal slide is atransverse guideway 5 in which is slidingly contained a cross feed slide6, from which rises a post or up-I right 7 vThe post is surrounded by asleeve 8, which is adjustable both'longitudinally upon and angularlyabout the post, and to which there is secured a bracket 9 carrying aclamp 10, by `which the work 11 is heldf,

Said sleeve may be considered as primarily-90 the work-holding orcarryulg, -memben Such clamp is mounted upon av horiontal arm 9 of thebracket, and consistsofay 'fixed rear jaw 12 and a movable front 10mounted to slide on the guide.V 13 and;A operable by a screw 14, whichengages a nut in the movable jaw and is held in' a bearing.` 15, whichforms a part of the guide 13. -Thi's Amand with a nut 17, whichcontains,an me hes 1 ner described so that theindcx .pin can he with the. threadsof, a longitudinal feed screw 18, which is rotatably supported inbrackets-19 (Fig. 3) and 20 (Fig. 4). The brackets 19 and 20.are fixedto the bed of the lathe and take the place ofthe foot stock. That partof the feed 'screw 'which passes through'and between these brackets ,isnot threaded, but has a plain bearing in the brackets. Collars 21 arefixed on the feed screw shaft on opposite sides of the bracket 19 toprevent endwise ,movement of the shaft. The outer end of the feed screw`lhaft beyond the, bracket 20 carries a gear wheel 22 and a crank 23.The latter may be .w Lated to place the slide 4 at any point ,u ithinthe hmits ofthe screw.

Mounted on the sleeve which projects from lhe bracket 20 and forms partof the bearing f for the screw shaft'is an arm 24, shown best in Fig. 6,having a longitudinal-undercut groove`25 on its side face, anda simin4lar groove 26 in its top face (see Fig. 2). The groove 25 receives thehead of a bear? ing stud 27, Whereon an indexing gear Wheel 28 ismounted. Such gear Wheel interchangcable'with others, and for thisreason the pivot stud is made longitudinally ad? instable in the slot 25so that larger. orv

smaller gears may be mounted thereon and put 1n mesh with the gear 2L.,A hand -Wheel or nut 29 isprovided Eor securing the stud rigidly in theslot. A block SO'is similarly secured adjustably in the slot 26 by meansof a bolt 31, having 'its head contained in Vthe undercut part of thegroove and its shank passing through the block and provided with a clampnut 32, with which is connected a handle 33. The block :ill is theholder for an indexing stop pin 34, which has a handle portion 35passingr through the block and is pressed toward the. indexing wheel28by a spring 36 contained within a socket 37 in the block through 'whichthe' pin and. its shank pass. The index wheel has one or more sockets inits face next toi 'the arm 24 arranged in circular series, and shaped sothat the indexy pin v vill fit there The block 30 is adjustablr- ,in theman-i* brought exactly int0-ali neu:.ent with the holes in the 'indexwlwfel. `This adjustment is evidently necessary when a larger or smallerindex wheel; substituted. for the one priv'ifiusluiu pl-ac LThe indexWheel is fitted willi-.1 handle BSS/which .may be use-cl,

if desired. iii-,u liu-ning it." The arm '224 isremovable and alsoadjustable.about the screw."

feed shui'l, and i'sclampcd in piace''id iounlly. having an openingthrough which passes-.ille sleeve on' *nich 'it is' :non ited,

mind having a lierfpaseing fron; its `innerend into this openingunidividing suchend imo mrs Irl. which may be drawn tege-thenbyarhuupscrew4d l It ill he readily understood thatby choosing the indexWheel 28, havin the desired gear ratio to the wheel 2.2 and having thenecessary number of holes or sockets'for the index stop pin, thelongitudinal screw feed may be manipulated to so index the work'thatequally spaced cuts at any desired distance apart may be produced `inthe work piece 11, in order, for example, to produce a rack. Theattachment may be clamped so as to be immovable by the longitudinal feedscrew by causing thelnut 17 to bind on the screw. For this purpose thenut is slotted longitudinally and provided with a" clamp screw 41, bywhich it may be brought to beartightly against the screw.

The cross feed slide 6 is confined in a' trough formed in the transverseguideway 5, and is retained by retaining strips 42 and 43. A rapid andcoarse movement may be given to this slide by a lever 44 mounted on apivot shaft 45, Which'is journaled in a bearing 46 and carries a pinion,not shown, in 'mesh with a rack 47 secured-tother cross slide. This feedmechanism is used when it is desired to .move the cross slide quickly.The accurate micrometric'adjustment .of the cross feed slide is effectedby a feed screw 48 (see 5, 7 and 8), which is threaded .through a nutfast to the guide 5 and not shown `in these drawings. This cross feedscrew is rotatably containedso that' it (yannot move endwise in abearing sleevel 49,` forming part of a slide or a traveler 50,

which is contained in a guideway in the 100 cross feed slide 6, and ismovable longi; tudinally with relation thereto when per` mitted. A bolt51 passes through a slot 52 in such traveler and through a hole in thecross feed slide. The head 53 of the holt lies under shoulders formed inthe underside of the traveler at each side of the slot 52, and a nut 5 4is threaded on the exposed end 0f the bolt. When this nut is set up thetraveler 50 is bound tight to the cross l'eed slide and any movementimparted to the traveler by the feed screw necessarily shifts the slide.The clamping nut 54 ,is re'- leased only when it is desired to make thescrew feed inoperative and to use the quick feed a/orded by thelev'er44.y A 'graduated collar 55 secured upon the cross feed .screw and isadapted to cbperatewith an index mark on the bearing sleeve 49 tomeasure the v nwvements given by thejfeed. screw to the crossfeed Slide.

'micrometric vertical adjustment is giyenfto the work holder by thevertical screw 56, .which engages a nut 57 on the Vsleeve 5s vof thework holding bracket, and is itself rotatably supported in alug 58 whichproierts from a ring 59 mounted on the top of'thc column or post T. Thisring rests on ashoulder 6l) near the topof the post and sin-rounds thereduced upper end 61 shown by dotted lines in Fig. 5. .ik cap 62 isselosl `cured in the4 lug 58.

i index mark and the screw carries a collar 64 equipped with a clampingscrew 65, and

formed with aV graduated beveled face close to .the index mark. A crankhandle 66 is providedfor turning this screw. The up and down movementsof the sleeve 8 are guided. by a key 67, Whieh'is a strip-laid againstthe outer surface o'f the post 'and secured in position by screws 68.

When it is desired to shift the Work holding bracket so that the cutsextend at a dif- I ferent inclination to the length of the Work piece,the screws 68 may be removed, thereby releasing the key and allowingtheWork holding bracket and sleeve to be turned about the post, sliding thekey With the' sleeve around the` post. The feed screw 56 and ring 59 arecarried with the sleeve, since the ring is also capable ofv turningabout the post. The sleeve 8 is split and may be clamped upon the postby screws 69, which are operated by a bar wrench 70. These screws passthrough flanges on the opposed edges of the sleeve, and an adjustablesto screw 71 is threaded through 'one of the anges to abut on the `otherso as to enable the sleeve to be so set up as to have a close fit aboutthe post Without binding.

The bracket 9 for the Work holding clamp is adapted to be removedl fromthe sleeve 8 to permit substitution of otheisorts of work holders. Suchbracket is, therefore, provided with a base plate 72 having guidingflanges 7? which embrace inclined surfaces of a guiding rib or plate 74which is formed on the sleeve 8. A bolt 75 passes through the base plate7 2 into the guide member 74,

and is provided With a tapped eye 76 engaged with a screw 77 (see Fig.l), which is held in a horizontal position within the guide member 7 4.The outer end'of the bolt 75 carries a nut 80, Which secures the bracketin place. The bracket being a separate piece from the sleeve and beingheld byv a bolt and a removable nutcan readily be removed. It may alsobe adjusted by the screw 77, which gives an adjustment supplemental tothat of the cross feed slide. By substituting other holders for thatshown on the bracket 9, many diverse kinds of Work may be performed withthe use o'l' the attachment having the other parts described.

l't will be seen that the attachment provides means for adjusting theWork with the utmost accuracy in the three coordinate directions, andthat in connection with each feed there is an indexing and measuring.means for determining with 'minute accuracy the extent of feed. Thereis also prrwision for angular adjustmento-f tnhework holder about thepost 7 and this angular adjustment is also measured accurately by meansot' a graduated ring 81 secured to the sleeve S and coperating with anindex mark on the post 7.

What Iclaim and desire to secure 4by v Letters Patent,is:-- p

1. A lathe attachment comprising supporting means, a slide mountedmovably upon said supporting means, complemental members, respectivelysecured upon said supporting means and said slide for giving the lattera relatively rapid movement, and 'additional means for giving the slidea finely graduated movement comprising a screw in threaded engagementwith said supporting means and appliances for detachably connecting saidscrew to the slide in a` manner such as to prevent longitudinal travelwith respect thereto. i

2. In a lathe attachment a post, a. sleeve,`

surroundingv said ost and ada ted to move both longitudinal y and rotataly with respect thereto, a screw for giving the sleeve its longitudinalmovement and a key for guiding such movement, said key .being detachablysecured tothe post and being Inovable about the same With the sleevewhen released therefrom.

3. In a mechanism of the character described, the combination of a guidemember and a supported member movable both longitudinally and laterallywith respect to said guide member, and a key element secured to saidguide member for limiting the movement of the supported member to onedirection, said key 'element being Wholly outside the surface of thesupported member and being detachably secured thereto, whereby said keyelement is movable transversely with the supported member When itsattaching means are disconnected.

4. In an apparatus 'oLtlie character described, the combination with aslide,Y a

:screw arranged parallelto theline of movement of said slide, a supporton which said slide is mounted for movementland with which said screw ismeshed, a. traveler movable in the saine direction as the slidei'i;which said screw has a bearing and ivfhich is provided with meansfol-,preventing endwise movement relatively to the screw, and

`means for effecting detachable union bello scribed, the combination ofa slide, a rack and pinion gear for giving said slide a rapid movement,and a screw feed mechanism for giving said slide a slow and ac curatelymeasured movement, Said screw feed mechanism including a screw, any

auxiliary slide engaged with said screw and means for -connecting anddisconnecting said auxiliary slide to and from the first named shde. 4

7. In an apparatus of the character de scribed, thee combination o'f abase, a crossr slide on said base,- a holder carried by' said slide, arack secured to the slide, a leveroperated pinion .meshing with said'rack for giving a rapid movement to said slide, andv Wheel and mountedwith provision for longitudinal adjustment on said arm, the second namedwheel being an index wheel and having an indexing stop shoulder and astop pin mounted on said arm and adjustal ble longitudinally thereof forcooperation with index wheels of different sizes.

9. In an apparatus of the character described, an indexing feedmechanism comprising a screw, a gear wheel connected with said screw, acomplemental changeable in- 'dex wheel meshing' with said gear wheel,

and an index stop complemental with said index wheel, said stop beingmounted with provision for adjustment toward and away from the screw,whereby to co-act with index wheels of different sizes. l

10. A. lathe attachment comprising a base adapted to be mounted on thebed of the lathe, longitudinal slide mounted on said base, und anadjusting screw for said longitudinal slide, a ycross feed slide mountedon the longitudinal slide, a postxrising from said cross feed slide, asleeve supported upon said post with provision for movementlougitudimllly thereon and also angularly about the same and a workholder secured to said sleeve with provisiony for adjustment thereon.

ll. lu a lathe attachment an upright post,- a sleeve adjustable on saidpost and having a. guide elenieut transverse to the post, a work holdingmember engaged with said gildeway in a manner to permit adjustmentlengthwise thereof, and means for securing aud adjusting said workholding member, comprising a screw having a bearing in tlieguideway, abolt having threaded eye engagedl with said screw and passing throughthe work holding member and a nut upon said .bolt arranged to confine aportion of said member between itself and .the guideway.

12. A lathe attachment 'comprising a base or support adapted to beplaced oh the body of a lathe, a cross feed slide on said support, meansfor adjusting said slide transversely of the lathe bed, a column-risingfrom said cross feed slide, a sleeve having a sliding fit on saidcolumn, a work holdingl member mounted on said sleeve, said member andtheY sleeve having complemental guiding means, arranged to permitadjustment of the work holding vmember transversely of Athe -column, andcomplemental adjusting means connected with said sleeve and saidV workholding member for elfecting such adjustments.

13. A lathe attachmentc-comprising a longitudinal slide, a cross slideon said longitudinal slide, an upright on said'cross slide, a member onsaid upright adjustable longitudinally thereon, an indexing feedvnchanism for one of saidslides, a micrometric feed' mechanism for theother slide,

and a micrometric a justing mechanism for said member. l Y

14. A lathe attachment comprising a base adapted to bev mounted on thebed of a lathe, a slide on said base, an indexing feed mechanism alsoadapted to be mounted .on the lathe bed and engaged with saidslide,

a cross slide, a micrometric feed` mechanismv engaged with both slidesfor feeding the cross slide, an upright on the cross slide, a membermovable along said upright, and a micrometric adjusting mechanism forshifting said upright.

15. A lathe attachment comprising a base adapted to be mounted on thebed of a lathe, a slide on said base, an indexing feed' mechanism alsoadapted to be mounted on the lathe bed and engaged with said slide, a

cross slide, a micrometric feedV mechanism engaged with both slides forfeeding thearound the post.

In testimony whereof I have aixed my signature, 1n presence of twowitnesses;

HENRICK J. HJORTH.

Witnesses ARTHUR H. VBrown', f i P. l'Piazzn'l'rm ros

